As has already been said. You are the one missing the point. I presume you are basin this 'rating' off BF phantoms and journalists... Fact is, they know very little other than some inside tips on who may go where or who speaks to who, but they would never know where recruiters rate players.
Always found the term 'slider' stupid for this very reason. They only slide when compared to BF hype. But at the end of the day they are drafted exactly where recruiters rate them. If Atley (to take your example) was so highly rated, he would have been taken earlier. But he wasn't. I feel many people latched onto his Judd comparisons too literally.